A new type of fusion reactor is presented. This device produces fusion by the collision of two oscillating plasma rings. This is a linear device similar in shape to a magnetic mirror with direct energy converters on its ends. An analysis is presented showing that this system can create net energy gain, even with an advanced fuel like p-11B. This advanced fuel eliminates neutrons and thus eliminates radioactive by-products. It is compact and can provide terrestrial power and power for space propulsion.